Squeeze 5.12 from DDE24, this is needed as the next move in the cat and mouse chase with RISC OS Select, which was rejecting some seemingly valid binaries as detailed
  https://www.riscosopen.org/viewer/view/castle/RiscOS/Sources/HWSupport/UnSqzAIF/Docs/signatures
here.

Version 1.69. Tagged as 'Library-1_69'